Intelligent electric measuring meter function introduction and wiring method introduction

With the wide application of high-precision measuring chips in measuring instruments, intelligent electrical measuring instruments have made great progress in both volume and function. It is getting smaller and smaller in size, more and more functions, and more diverse in communication modes. From general Modbus-RTU to MBUS, CAN BUS, BACNET and PROFITNET, the application of these communication protocols can enable the measurement data at the bottom to be transmitted to the management equipment or management software at the upper level in a faster and more stable way. Let's take ELECNOVA LNF96EY multi-function electrical measuring meter and LNF96I3Y three-phase ammeter as examples to introduce the functions and wiring methods of these two meters. High-precision measurement of all commonly used electrical parameters in three-phase power grid system: three-phase current, three-phase voltage, active power, reactive power, power factor, grid frequency, active energy, reactive energy, and communication interface and electric energy pulse output function. Adopt Modbus-RTU communication protocol to realize LCD display and remote digital communication. It has the characteristics of convenient installation, simple wiring, small quantities of work, field programmable setting of input parameters, and can complete the networking communication with different PLCs and industrial control computers in the industry.

Harmonic knowledge of power equipment hazards

Harmonic knowledge of power equipment hazards (1) Hazards to Power Capacitors When there is a harmonic in the power grid, the terminal voltage increases after the capacitor is inserted, and the current through the capacitor increases more, which increases the power loss of the capacitor. For film-membrane composite dielectric capacitors, although the power loss when harmonics are allowed is 1.38 times the power loss without harmonics, the power loss when harmonics are allowed for all-film capacitors is 1.43 times that without harmonics, but if Higher harmonic content, beyond the capacitor allowable conditions, will make the capacitor over-current and overload, the power loss exceeds the above value, so that the capacitor abnormal heat, the insulation medium under the effect of the electric field and temperature will accelerate aging. Especially when the capacitor is put into the power grid where the voltage has been distorted, the harmonic of the power grid may also be exacerbated, that is, the phenomenon of harmonic expansion occurs. In addition, the presence of harmonics tends to make the voltage appear sharp. The steep-peak voltage wave easily induces partial discharge in the medium. Due to the large voltage change rate and partial discharge intensity, it can accelerate the aging of the insulating medium, thus shortening it. The service life of the capacitor. In general, for every 10% increase in voltage, the life of the capacitor is reduced by about 1/2. In addition, in the case of severe harmonics, the capacitor will bulge, breakdown or explosion. (2) Harm to Power Cables As the frequency of harmonics increases, the skin effect becomes more significant as the cross-sectional area of the cable conductor increases, resulting in an increase in the AC resistance of the conductor and a decrease in the allowable passing current of

Focus on new energy | SFEER Electric actively participates in the construction of a new energy system

Focus on new energy | SFEER Electric actively participates in the construction of a new energy system A recent popular report puts forward: "accelerate the green transformation of the development mode, implement a comprehensive conservation strategy, develop green and low-carbon industries, advocate green consumption, and promote the formation of green and low-carbon production methods and lifestyles. Deeply promote the prevention and control of environmental pollution, and continue to deepen Battle for blue sky, clear water, and pure land, basically eliminate heavily polluted weather, basically eliminate urban black and odorous water bodies, strengthen the prevention and control of soil pollution sources, improve the level of environmental infrastructure construction, and promote the improvement of urban and rural human settlements. Improve the diversity and stability of ecosystems , Sustainability, speed up the implementation of major projects for the protection and restoration of important ecosystems, implement major projects for biodiversity protection, promote recuperation in grasslands, forests, rivers, lakes and wetlands, implement a ten-year fishing ban on the Yangtze River, improve the system of fallow and rotation of cultivated land, and prevent and control the invasion of alien species. Actively and steadily promote carbon peaking and carbon neutrality, based on China's energy resource endowment, insist on establishing first and then destroying, plan and implement the carbon peaking action step by step, deeply promote the energy revolution, strengthen the clean and efficient use of coal, and accelerate the planning and construction of a new energy system, Actively participate in the global governance of climate change." SFEER Electric has been actively participating in the construction of new energy systems, and is committe

Focus on new energy | SFEER Electric actively participates in the construction of a new energy system

Focus on new energy | SFEER Electric actively participates in the construction of a new energy system A recent popular report puts forward: "accelerate the green transformation of the development mode, implement a comprehensive conservation strategy, develop green and low-carbon industries, advocate green consumption, and promote the formation of green and low-carbon production methods and lifestyles. Deeply promote the prevention and control of environmental pollution, and continue to deepen Battle for blue sky, clear water, and pure land, basically eliminate heavily polluted weather, basically eliminate urban black and odorous water bodies, strengthen the prevention and control of soil pollution sources, improve the level of environmental infrastructure construction, and promote the improvement of urban and rural human settlements. Improve the diversity and stability of ecosystems , Sustainability, speed up the implementation of major projects for the protection and restoration of important ecosystems, implement major projects for biodiversity protection, promote recuperation in grasslands, forests, rivers, lakes and wetlands, implement a ten-year fishing ban on the Yangtze River, improve the system of fallow and rotation of cultivated land, and prevent and control the invasion of alien species. Actively and steadily promote carbon peaking and carbon neutrality, based on China's energy resource endowment, insist on establishing first and then destroying, plan and implement the carbon peaking action step by step, deeply promote the energy revolution, strengthen the clean and efficient use of coal, and accelerate the planning and construction of a new energy system, Actively participate in the global governance of climate change." SFEER Electric has been actively participating in the construction of new energy systems, and is committe

Smart Meter Application Accelerates Power Meter Change

Unlike conventional meters, as an effective link between the power grid and the home, smart meters are more user-friendly and safer. With the introduction of smart meter replacements in various regions, the degree of penetration will increase, and quantitative changes will result in qualitative changes. Causes power change. State Grid Corporation of China held a working conference in 2014 and clearly stated that it plans to install 60 million new smart meters in 2014, which is more than double the planned amount in 2013. According to reports, the 2013 State Grid Working Report at the beginning of last year required the application of modern technologies such as the Internet of Things and cloud computing to build a new generation of smart substation demonstration projects, and promote distributed power grid connection, smart grid control systems, and distribution automation. . Installed 30 million smart meters and new electricity meters, and converted 3 million electric meters. Comparing the two-year work plan, we can see that in 2014, we quantified the work goal of building a new generation of smart substations and intelligent transformation of substations, while the installed capacity of smart meters increased from 30 million to 60 million. With the development of electronics, information, software, communications, and electromechanical control technologies, the output of electronic energy meters in China has now become an absolute advantage and is gradually replacing the existing inductive energy meters. The development of related technologies has promoted the continuous upgrading of electrical instrumentation product technology. Some industry analysts believe that in 2016 China's smart grid will enter the stage of imp

Analysis Report on Development Trend of China Low Voltage Electrical Industry 2023-2026

Low voltage electrical products are widely used in the fields of construction, industry and infrastructure. Affected by the investment, construction and commencement of downstream industries, the low-voltage electrical appliances market is cyclical and volatile. In 2021, due to the impact of the project delay in 2020 and the increased investment in the infrastructure industry, the domestic low-voltage electrical market will grow at a high rate of 9.5% year-on-year. In 2022, due to multiple factors such as repeated regional epidemics, slowing industrial recovery, downward construction, and poor international market environment, the low-voltage electrical market will have a bad start and enter a low growth period. The annual growth rate is expected to be about 1.9%. China's low-voltage electrical market scale - 2011-2026E (100 million yuan) The 2022 low-voltage white paper was completed in early June. The 2022 forecast is based on the judgment at the beginning of the year. The overall business forecast is slightly increased, which is optimistic. It is now observed that due to the continuous impact of the epidemic in the second half of the year, the real estate downturn has increased. It is estimated that the

Application of Communication Gateway in EMS

With the widespread application of intelligent equipment, the automation level of power distribution system is increasing. In order to make full use of the equipment capacity and improve the security, reliability and stability of the distribution system, users need to configure a matching power monitoring system for centralized and efficient management. As the middleware of the monitoring system, the communication gateway can be widely used in the integrated automation system of power plants, substations, centralized control stations, distribution network sub station/master station system, regional power grid dispatching automation, airport, tunnel, highway and other power monitoring and other electromechanical centralized control systems. 01 Communication gateway SC series SC series wireless communication modules support transparent transmission modes of LoRa, NB-loT, 4G and RS485. LoRa communication gateway uses serial port to transmit and receive data, which reduces the threshold of wireless applications and enables one-to-one or one-to-many communication. Among them, the SC2 LoRa communication module is widely used, and its characteristics are as follows:

Application of Elecnova Power Quality Products in Supercomputing Center

The supercomputing center is built on the basis of supercomputers to solve large and complex problems that cannot be completed by ordinary computers and servers. Compared with the early computing center, its computing capacity has made a huge leap, and its applicable fields and usage patterns have been greatly expanded. The supercomputing center is built on the basis of sufficient scientific and technological innovation capabilities and application needs, and is a concrete manifestation of a country's and region's independent innovation capabilities and comprehensive competitiveness. Large data centers have high requirements on the power supply stability of supercomputing rooms. There are a large number of UPS and switching power supplies in the communication system. While improving the power supply stability of computer rooms, such equipment will generate large 5th, 7th and 11th harmonics. Sometimes, UPS incoming line switch

How to solve the normal problems of the current transformer at the site

High accuracy current transformer is composed of closed iron core and winding. The number of turns of its primary side winding is very small, and it is connected in series in the circuit of the current to be measured. The number of turns of the secondary side winding is relatively large, and it is connected in series in the measuring instrument and protection circuit. When the current transformer is working, its secondary side circuit is always closed, so the impedance of the measuring instrument and protection circuit in series is very small. The current transformer is used to convert the large current at the primary side to the small current at the secondary side, and the secondary side cannot be opened. Special Remind

Application of Elecnova Power Quality Products in Sewage Treatment Plant

With China's increasing attention to environmental protection, there are more and more sewage treatment plants in various places. In order to improve the automation level and operation efficiency of equipment, sewage treatment plants have adopted a large number of power electronic equipment, such as frequency converters, soft starters, computers, uninterruptible power supply equipment, etc. This kind of equipment absorbs energy from the system in a way that is not a continuous sine wave, which will generate a large number of current harmonics. The impedance of the harmonic current flowing through the system will be superimposed on the power grid to distort the voltage of the power grid. The main hazards of harmonics are: Cause series resonance and parallel resonance, resulting in dangerous overvoltage or overcurrent; Harmonic loss is generated, which reduces the efficiency of power generation, transformation and consumption equipment;

Multi-User Prepaid Electric Energy Meter

In recent years, due to the power management requirements of large shopping malls and campus dormitories for tenants and students, business or property management companies have put forward the demand for multi-user prepaid electricity meters. According to market needs, the R&D personnel of Elecnova have launched a new multi-user prepaid energy meter-S36 series. The implementation of the meter can greatly improve the management efficiency of each power circuit for the owner and the campus management department. Next, let's take a look at the revolutionary new functions of ELECNOVA-S36. Introduction S36 series multi-user prepaid electric energy meter is designed with advanced microprocessor and signal processing technology. It has the functions of full power measurement, electric energy measurement, time-sharing billing, prepaid, demand statistics, event recording, malignant load identification, fault alarm, etc., and is equipped with switching value input, relay output, pulse output and RS485 communication interface. S36 multi-user prepaid electric energy meter consists of a master module and multiple slave modules. The slave modules are divided into direct access type and CT access type. S36 supports direct access to 36 single-phase or 12 three-phase circuits at most, or 24 three-phase circuits through CT. The direct access slave module has built-in m

Sub-meter power meter manufacturers: sub-meter power meter achieves intelligent management and control of pollution control equipment

Sub-meter electricity metering system to supervise the operation of enterprises' pollution control facilities. The operating principle of the system is: relying on the Internet of Things technology and power parameter sensing technology, the metering and metering platform collects real-time data such as the total power consumption of the enterprise, the power consumption of the process production equipment, and the power consumption of pollution control facilities. Over-limit analysis, production limit analysis, process correlation analysis, etc., found that environmental protection facilities, equipment, etc. were not turned on, idling, deceleration, frequency reduction, and abnormal shutdown were not working properly. At the same time, sub-meter power metering can also monitor the operation status of enterprises that restrict production and stop production in real time through data analysis. Before the installation of the environmental protection power monitoring system, experts should be organized to comprehensively analyze the power consumption relationship of the enterprise's "pollution and pollution control" facilities; the installation process is "no power outages, no wiring, no debugging", without affecting the normal production of the enterprise. Install the detection equipment in the shortest time, and use the Internet of Things technology for data transmission to smoothly collect real-time data of the enterprise, which can quickly complete the platform architecture. Meter-by-meter electricity metering is real-time dynamic monitoring of the power consumption of production facilities and pollution prevention facilities that are not included in the automatic monitoring of pollution sources, to determine whether the pollution prevention facilities are operating normally, and whether production shutdown measures are in place to

Application of SCK600 Electric Fire Monitoring System in the First Affiliated Hospital of Zhengzhou University

The First Affiliated Hospital of Zhengzhou University was founded in September 1928. In 1958, it moved to Zhengzhou from Kaifeng and renamed as the First Affiliated Hospital of Henan Medical College. In 1985, it was renamed the First Affiliated Hospital of Henan Medical University. In 2000, it was incorporated into the new Zhengzhou University and officially named as the First Affiliated Hospital of Zhengzhou University. The First Affiliated Hospital of Zhengzhou University is one of the few modern comprehensive hospitals in China, which integrates teaching, scientific research, medical treatment, prevention, health care and rehabilitation, and has strong treatment ability, international communication ability and high scientific research level. With a target of 10,000 beds and an annual outpatient volume of about 4 million, it is known as the "Central Plains Medical Aircraft Carrier" and can be called the largest hospital in the world.

Power quality and its index

An ideal power system should supply power to users with constant frequency and sinusoidal waveform according to the specified voltage level. In the 3 phase AC power system, the voltage and current of each phase should be in a symmetrical state with equal amplitude and 120° phase difference. Because the parameters of system components are not ideal linear or symmetrical, coupled with imperfect control means, different load characteristics and randomness of its change, operation and various faults, this ideal state does not exist in practice, so the concept of power quality came into being. Power quality can be defined as: the voltage, current or frequency deviation that leads to the failure of electrical equipment. Its contents include frequency deviation, voltage deviation, electromagnetic transient, power supply reliability, waveform distortion, 3 phase imbalance, voltage fluctuation and flicker.

The implementation of Energy Management System in Smart buildings

The president of Cambridge Energy Research Associates Daniel Yergin called [Energy Saving" as the Fifty Energy to emphasize the importance of energy allocation in the future. Energy consumption of industry, transportation will be taken place by building industry which accounts 33% as the largest energy consuming industry of the society. In this regard, the development and promotion of low energy consuming technology in the large scale public buildings is one of the most important methods to release the energy supply stress and solving the conflict between economic development and shortage of energy supply. Energy management system is the derivative of the smart energy concept. With the idea of networking, integration and intelligent to establish a management system for monitoring, measuring and management the electricity, water and gas consumption by smart meters in various dimensions such as category, segment and projects by dynamic trend analysis to help the user understand the status of energy consumption and optimized the energy saving solution. Demand Analysis: 1) At the contractor should allocate the data acquire devices such as smart energy meters, multifunctional meters and PQA etc. Which could fulfil the measuring requirement in different point to guaranty the reliability and stability of the energy data, reduce the workload of the staff and obtain the ene

Why sensors play an important role for smart factory

In recent years, the wave of intelligent manufacturing has become higher and higher. One of the key technologies in the construction of smart factories is industrial sensors. Sensors provide haptics for smart factories and are the primary link for automatic detection and automatic control. In the automated production process, various sensors are needed to monitor and control various parameters, so that the equipment can work in a normal or optimal state, and the products can achieve the best quality. Sensors are devices designed according to the physical, chemical and biological characteristics and laws of materials. There are many kinds of sensors. They are usually divided into ten categories according to their basic sensing functions, such as thermal sensor, photosensitive sensor, gas-sensitive elements, force-sensitive elements, magnetic-sensitive elements, humidity-sensitive elements, sound-sensitive elements, radiation-sensitive elements, color-sensitive elements, and taste-sensitive sensor. In the field of measurement and control, a sensor designed by a certain principle can measure a variety of non electric quantities at the same time, and sometimes a non electric quantity can be measured by a variety of sensors with different principles. Therefore, there are many classification methods for sensors, which can be generally classified according to the following methods.

Trends of the smart meters

What is smart meter? Smart meter is the basic device for the data acquisition of the smart grid particular for the smart power distribution system, it undertaken task of primary power data acquisition, measurement and data transmission, it`s the foundation of information integration, data analysis and display of the power distribution system. Besides the traditional measurement function of the power meter, the smart meter also available for bidirectional multi-tariff, multiple user control function and various modes of data transmission for directional data communication, anti-stealing electricity for the use of smart grid and new energy 2. Trends of the smart meters 2.1 Diversified communication In recent years, the trend of power measurement goes to digitalized and systemized, the traditional smart meter were limited by the wiring requirement for those renovation projects. As the mobile communicati

The use of intelligent motor control system in industrial application

Abstract This article is to analyze the Motor Control Center (MCC) by its technical structure and network structure, intelligent components and software. By use the typical design process to analyze the implementation of the MCC in the industrial area and technology development trend. typical design process analysis for the intelligent MCC 1. Motor control center,MCC The motor control center production plays an important role in the industry production, It`s the integration of various motor control and processing control devices. For those application of traditional MCC products, the control system is connect by wire connection for data transmission, the wiring is very complicated and the data transmission is very limited. As the technology development of IT and intelligent electronic components, it comes out the new generation of intelligent motor control center(iMCC), which is the combination of hardware, software and networking. Advantages:

EU countries ready for the boom of EV chargers after Convid Pandemic

With the European Union gradually announcing the end of COVID-19, the European auto market has finally restarted with difficulty. In the face of the auto industry, which has been hit hard by the epidemic, European governments have recently introduced stimulus policies, and these policies pay special attention to new energy vehicles. In addition to the "overweight" of electric vehicle purchase subsidies, European governments have also actively allocated funds to vigorously promote the construction of electric vehicle charging infrastructure. On the one hand, the sales of electric vehicles in Europe continue to grow, and the current public charging stations may not be able to meet the needs of future users; on the other hand, consumers' "range anxiety" about electric vehicles is also one of the main reasons for affecting car purchases. Therefore, speeding up the construction of charging stations has become a top priority. The European Union and many European countries have also listed accelerating the construction of

China IDC data center trend and the branch critical measuring instrument for Track busway

IDC is the abbreviation of Internet Data Center. IDC generally refers to the place that can provide basic data services and value-added services, including site resources, power resources, network resources and equipment resources, as well as professional management. Based on this platform, IDC service providers provide customers with Internet platform basic services and various value-added services. Benefiting from the development of global cloud computing industry and the change of communication networks, from 2014 to 2019, the CAGR of global IDC market can reach 20.3%, and the CAGR of the Chinese IDC data center market is 32.9%. In the future, benefiting from Cloud computing and 5G infrastructure construction, the IDC industry will continue to be in a period of high prosperity, and the high revenue rate is expected to be maintained. From 2019 to 2022, the CAGR of China's IDC market will remain around 32%, beyond the global level. The investment scale of China's data center will continue to grow in the coming future. Judging from the number and utilization rate of existing data centers in China, the number of data centers in China in 2019 is about 74000, accounting for about 23% of the total number of global data centers. From 2016 to 2019, the number of data center racks in China increas

New Opportunities for African Solar Photovoltaic Power Generation

Due to the continuing geopolitical conflicts, the international energy price has continued to rise. The efficient utilization of renewable energy such as solar energy and bioenergy has been valued again, showing new opportunities. For example, solar photovoltaic power generation is one of the widely accepted renewable energy sources. The conditions for its realization are very simple. At present, it has been widely used in Africa and Europe. We have already mentioned how Europe, as a leading advocate of environmental protection, uses solar energy efficiently. Today, we take Seneca in Africa as an example to see the local utilization of solar energy. According to statistics, African countries installed millions of solar panels in 2019-2021. By 2023, Senegal may have more than 4 million solar panels installed. By 2024, about 2.5% of households will be equipped with solar panel system. Generating electricity

A new generation busway temperature monitoring system by Elecnova Sfere702

01 Introduction As a new type of power supply trunk line, the bus duct has been widely used in power distribution design and application in a large number of high-rise buildings and large workshops. The bus duct is composed of metal protective shell, conductive bar, insulating material and other accessories, which requires high heat dissipation and insulation performance. If the temperature of the bus duct is keeping a high value, it will not only accelerate the aging of insulation materials, reduce operation reliability and shorten its serving life, but also threaten the safe operation of other related equipment. In addition, the contact resistance of the bus duct connection is increased due to oxidation, dust or other factors, and it is easy to cause the local operation temperature of the bus duct to rise too high, which needs to be monitored. Therefore, the real time online monitoring of temperature and humidity of the bus duct could assure the safe operation of the bus duct and the prevention of accidents significantly.

Case study for Power quality mitigation wireless remote monitoring solution applied in Chip set Manufacturing project

Project backgrounds Integrated circuit chip(short as IC ) manufacturing industry is a precision manufacturing industry with highly capital-intensive and technology-intensive. The production process needs high environmental cleanliness and strict temperature and humidity control. The manufacturing process is highly automatic which request a high standard for the power quality of the electric system. The IC manufacturing has many key equipment, many working position instruments, and various and complex process steps. In addition to the power supply and distribution system, transmission system, ultra pure water purification system, vacuum system, air cooling system and special gas distribution system are also required to assure the implementation of the production process and the safe operation of key equipment. Since the production conditions of the whole factory are finally realized by the power supply, the IC manufacturing has particularly high requirements on the quality of the power supply. According to the actual situation of semiconductor factories, the SFR-PQM power quality mitigation platform is designed.